Dissociation of Urethral and Anal Sphincter Activity in Neurogenic Bladder Dysfunction

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Abstract
In 53 patients with suspected neurogenic bladder of dysfunction CO2 cystometry was done in combination with urethral and anal sphincter electromyography. Complete dissociation between the reflex activity of the 2 sphincters was found in 25% of the patients and only 58% of the patients had identical reflex activity. Anal sphincter electromyography is highly unreliable in the diagnosis of urethral sphincter dysfunction.